Drive mechanism



Jan.2,1945. EHA/l. 2,366,523

DRIVE MECHANISM Original Filed Feb. 16, 1942 4 Sheets-Sheet 2 @mzdwzmymw i P. HAIG DRIVE MECHANISM Jan. 2, 1945.

Original Filed Feb. 16, 1942 4 Sheets-Sheet 3 @y jaw, @mg/mw.

Jan. 2, 1945. p, HMG 2,366,523

DRIVE MECHANI SM Original Filed Feb, 16, 1942 4 Sheets-Sheet 4 l description.`

.thearrow Figure .15 is .a view partly` in section .and .partly Patented Jan. 21945 imm-.MECHANISM .Baul Haig, Chicago, nl., assignorto Inland` Steelr Company, Ware Chicago, Ill., a corporation .of` Dela` f original application February i6, 1942, serial Ne. f 431,061,1ww Patent No. 2,329,530, ama srp-` tember 14, '1943. Divided and this application L :my 13, 1942, ser-mino. 450,829 (o1. ici-1.64) g g ,elements, such as tor .example polishingblocks,

Mir-invention reiatesgenerally to drive mechanism for driving a movable mem-ber, such as -for` example, a member positioned to engage and be reciprocated along the roll or rolls lof a mill, :as for instance that-used in the rollin-g of steel or other `ferrous metals, to clean therefrom objec-` tionable matter such as dirt and metal grit which becomes `deposited thereon during theyoperation of the mill and is required to ybe lremoved for the production of the desired product; this application being a division of my Patent 2,329,63,v

`issued September 14, 1943.

Une -ofmy objects is .toprovide a construction l of drive `:mechanismwhich will operate ranto-` matically to produce the desired:` continuing` movement of the member `:to ibe :driven thereby as;`

forexample to reciprocate along amill a polish.`

ing element to cleanthe roll "or rolls thereof, and which will be positive'fin operation; .and other objects as will be manifest from Referring :to the` accompanying drawings:

`Figure 1 is a View invertical sectional eleva tion of a 4highmill .equipped with apparatus embodying my invention `for .cleaning itherolls of the imill, thesectionbeing .takenlat the `line I onFig. 2 and'viewed inthe direction ofthe arrow. A Figure 2 is a plan `sectional 'View .of .the structure shown in Fig.. l, 4with certain `parts -broken Figure Y3 is a front view of the structure `of Figs. l and 2. the `structure being -viewedwfrom the left in these iigures.

Figure 4 is an enlargedsection taken` at the line Aeon 2 and viewed in the idirection `of inl elevation 4of a valve and `valvefcontrolling `mechanism A.for controlling the operationlof the polishing elementswof the apparatus, the section being takenat .the line 5 onfFg. 6 land lviewed in the direction of the arrow; .andV l Figure 6, a sect-ion taken at nre une t on rig. s

andviewed in the directionwof the` arrow.

[I have chosen to :illustrate my invention in connection with a14-highmilLsnch asis used for rolling steel, the relatively small ,Working rolls thereof, represented at wand Il and the rela tively large backfup rolls thereof, represented at YI2 and 13, being journaled in the `frame :il

of ,the roll-stand. l A

ciprocating iengthwise of the rolls` :and 1in en sagement therewithat .the nips between @the workinglrolls and the Vbach-up rolls, polishing the following represented at 115 and |16, respectively, 4which `serve to clean the rolls. Referring first `to the mechanism by ywhich the lower polishing element i5 `is operated, it ,ccmprises a stationary rigid frame lI extending lengthwise `oi therrolls of the mill stand and in front thereof and tormedzof a pair- 4o1 spaced apart brackets t8 `and t9 secured to the Amill 4frame M, and tie rods 20 and 2 I` rigidly connecting the brackets together, .a squareshaft 22 extending lengthwise of the ,frame I 4 beineyjournaled in the Vbrackets .i8 and `I9 and held against'length- Wise movement.

, Mounted on the tie rods 2.a and 2.1` ane the square shaft :22 to be reciprocated lengthwise of the frame i4` is a `carriage l23 comprising la `pair ofspaced apart plates 2,4"and 25 having bearing extensions 25 and 21, through vvwhich the ,tie rods 2,0` `and .2l` zand the square shaft 22 extend, the

shaft .22 being free to rotate in the ,carriage :2.3;`

a `channel plate 28 in the `space between the plates 2.4 `and 2.5 Vand .secured at .its `,ends .to :these plates;

and a .slide 29 to .which the polishing element t5 is connected, mounted in the anges .of the chan nel plate .28 and slidable toward .and yaway from the mill stand.

The .slide 29 is shown .as formed of a pair .of

spaced apart `angle `bars Stand 3.l `connected together bytie rods 32 ,and 33 .by which the slide is .mounted on the .carriage 23 the tie. .rods 32 and 33 ,extendingslidinglythrough .openings 34 in the flanges of the channel plate 2,8, and ,an

arm` 35 secured at one end to the angle iron 3i and "providedat `its other end with `a clevis 35 secured to the ,arm 35 by a Ahorizontal pix/.011131, the polishing `element I5 clevis 36;`

Means are provided to aotuate `the slide A2.9 to

move the lpolishing' element ,l5 into `.and out of` operative position, and to cause .the-"polishing element to exert, when in operating position, a `steady predetermined `pressure against the rolls.

` The means shown jfor this purpose comprise a .Infthis `arrangement provision isrnadelforrer;

lever 38 which floats, at `a hub portion 39 there` on, on the square shaft 22 and extends at its outer` end into an opening i0 in the angle-,bar 3B of l the slide 29, `the hub portion 39 of 'the lever 38 having a square hole 7lil Wl'lichmatcl'ies the'sguare shaft 22 and through which the latter extends, whereby 'the lever 38 is oscillated responsive to the `forearm of the square shaft 22. on the extended'end 42 of `'thesquare -shaft22 a lever 43".`

having a slidably adjustable Weight M thereon, is journaled Vwie extended end 42 of the shaft 22 lies within a hub 45 keyed tothe shaft 22 and l'being securedin the polishing element I5 toward the mill to the position shown in the drawings, the force exerted by the lever 43 in this position causing the polishing element I5 to press steadily and with predetermined force against the rolls; such force being regulated by the adjustable weight 44. When the lever 43 is thrown toward the mill it 'engages the lug 41 and rotates the shaft 22 in a direction to move the slide 29 and polishing element I5 away from the mill.

The means shown for reciprocating the carriage 23 and with it the polishing element i5,

comprises a fluid-pressure-operated piston and cylinder mechanism 48 (the iiuid'pressure usedv by way of example and preferably being compressed air) formed of a stationarily supported cylinder 49. and a piston (not shown) operating therein and having a piston rod 59 pivotally connected at 5I with lugs 52 on the carriage' 23. These means also comprise mechanism for controlling the supplying of operating fluid to the cylinder 49 and the exhausting of the spent fluid therefrom to eiect the automatic reciprocation of the carriage 23 and polishing element I5. The mechanism shown forl this purpose comprises a valve device 53 operative in one position to supply fluid pressure to one end of the cylinder 49 and openthe other end thereof to exhaust, to move the carriage 23 and polishing element I5 in one direction and in its other position to cause the uid and exhaust to reverse to move the carriage and the polishing element inthe opposite direction. This mechanism also comprises a, bridge element -54 pivotally supported at 55 on` a standard 58 and controlling the valve device 53; a slide or floating rod 51 slidable in the frames I1 and I8 relative to which the carriage 23 is slidable; a link 58 pivoted at one end, as represented at 59, to the yrod 51; a lever 58 pivoted at 6I to the standard 58 and carrying a weight 82 slidably adjustable thereon; and a link E3' pivoted at its upper end, as indicated at 64, to the lever 68 and b etween its ends, to the link 58, by a pivot pin 65 on the link 63 extending into a slot v66 in the link 58, the lower end of the link 63 having a roller 61 bearing downwardly on the bridge member 54. The Slidable rod 51 is provided at opposite sides of the carriage 23 with stops 88 and 69, in the form of collars slidably adjustable thereon and adapted to be set in any desired position lengthwise of the rod 51, by means of pins 1Il which may be inserted into holes in the stops 68 and 59 and selectively into holes 1I in the rod 51 to regulate the stroke of the piston and cylinder mechanism and therefore the stroke at the carriage 23, coil springs 12 surrounding the rod 51 being interposed between the carriage 23 and the stops 68 and 69.

Any suitable construction of. valve device for controlling the supplying of fluid pressure to the cylinder 49 and the exhaust of the spent iluid therefrom may be employed. That shown at 53 is of a well known 4-way type and the follow'-` ing general description thereof will therefore sufce. It comprises a valve casing 13 alfording an upper inlet chamber 14 and a lower exhaust chamber-15, a pipe 16, which leads from a suitable source (not shown) of operating iiuid pressure, opening through the bottom of the lower chamber 15 into a tube 11 communicating with the upper chamber 14 through an opening 11a in the bottom of the chamber 14. An exhaust pipe 18'opens into the lower exhaust chamber 15 through an opening 19 in the bottom thereof.

A tube 88 opens at its opposite ends into open.

ings 8| and 82 'in the top and bottom walls of the lower chamber 15, and has a solid partition 83 between its ends dividing the space within the tube into upper and lower chambers 84 and85, respectively, these chambers being open to the inlet chamber 14 and the opening 82 in the bottom of the chamber 15, respectively, from which opening avpipe 86 opens into the right hand end of cylinder 49, the side wall of the tube 80 above and below the partition 83 being ported as represented at 81 and 88, respectively.

Slidable vertically onthe. tube 8D is;a sleeve 89 having an annular groove 93 in its inner sui'- face (Fig. 5) which controls communication be-A l tween the ports 81 and 88 and between the ports 88 and the exhaust chamber 15, the upper por.

tion 89a, of the sleeve being of larger diameter than its lower portion 89D. In the raised position of the sleeve 89, the ports 81 and 88 are out of communication and the ports 88 are open to the exhaust chamber 15 permitting of the driving of the carriage 23 by the piston and cylinder mechanism 48 to the right in Fig. 3 responsive to fluidpressure introduced into the left hand end of cylinder 49. In the lowered position of the sleeve 89 the ports 81 and 88 are in communication and the-ports 88 closed to the exhaust chamber 15 permitting actuating iluid pressure to enter the right hand end of the cylinder 49.

v The sleeve 89 is reciprocated by means of-'a plunger 98h vertically Slidable in the valve cas? ing 13, and straddling the upper portion 89a of the sleeve at a recess 9i in the plunger, as more clearly shown of the other sleeve and plunger assembly presently to be described.

Control means 92 are also provided for the left hand end of the cylinder 49 of identically the same construction as the control means abovedescribed for the right hand end of this cyli'nh der. The partitioned tubev of the means 92 and corresponding with the tube 88, is represented y at 93 and connects at its lower end with an open.

ing in `the bottom wall of the lower exhaust chamber 15, this olpening communicatingy with apipe 94 which opens into the left hand end oi'.A

a cylinder 49; the upper end of the tube 93 communicating with an opening 95 in the top wall of this chamber which opens into the upper inf let chamber 14. The sleeve-of these means and corresponding with vthe sleeve 89 is represented at 96 andthe actuating plunger therefor, corre-v sponding rwith the plunger b, at 91, ythe man-V ner in which the sleeve at its upper end is strad-` dled by the Iplunger at its recess here indicated at 58, being more clearly illustrated.

'I'he plungers 90b and 91 are pivotally connected,y

to the ends of the pivoted bridge54 at opposite sides of its pivot 55 by pinsA 99 and I 80 on the bridge and extending through slots 98a and 91ml in the plungers 98h and 91, respectively, where- I by, in the position of the bridge 54 as shown in the drawings, the plunger 98h is in raised posi-z tion, opening the right hand end of the cylin` der 49 to exhaust, and the plunger 91 is in lowl ered position in'which position the left hand end`l of the cylinder 49 is open to the inlet chamber 14 and is closed to exhaust, in-whichposition' latch means |23 for releasably` holding of the parts the carriage 23 and polishing element l5 are being driven to the right in Fig.` 3. When the bridge 54 is rocked clockwise to its extreme `position the plunger 90b is forced to lowermost position and the plunger 61 to uppermost position, thereby reversing the flow of fluid pressure to the cylinder Y49 and the exhaust therefrom whereupon the carriage 23 and the polishing block |5 are moved to the left in Fig. 3.

From the above description it willbe understood that when the carriage 23 moves in either direction, it rst strikes one of the springs 12, causing the link 63 to be pulled or pushed, as the ease may be, through the medium of the link 58. As the roller 61 moves along the bridge 54 toward the pivot 55 vof the bridge, the engaged one of the springs 12 becomes compressed whereupon, the roller 61, upon reaching the center of the bridge will be caused, by the actionl of the spring, to snap over dead center and reverse the position of the bridge, thereby `preventing the bridge from comingto rest on dead center, the weighted lever 60 being lprovided to ensure such reversal of the fluid pressure controlling mechanism of the valve device 53 by the downward thrust which it exerts on the link 63. Check pins and |02 on the standard 56` limit the Stroke of the roller 61 in different directions.

The polishing unit represented at |03 for the upper working and back-up rolls I0 and I2 is of the same general construction as the `polishing unit above described. It comprises a carriage |04 shown :as formed of spaced plates. and |06;

the arm |24 below the shoulder |21, and engageable by the pin |28 on the lever |2| permits of the automatic locking ofthe lever.|2| in raised posi-` of power, viz., the piston and cylinder mechanism 49. To this end connections are made between the carriages 23 and |04 for operating the carriage |04 responsive to the movements ofthe carriage 23. These connections are shown as comprising two chains |30 and |3|, the chain |30 being connected at one end to the plate 24 of car riage23 and at its other end to the plate |05 of carriage 04, this chain being trained over pulleys |32, |33 and |34, supported on the frame |4 of the webs |01` connecting the plates|05 andA |06 tol gether and braced by cross bars, oneof which is shown at |06, the carriage |04 being mounted to reciprocate lengthwise of the rolls of the mill,

` on parallel guide rods |09 and I|0 which arcsecured at their ends to the frame |4 of the mill and extend through the plates |05 and |06; a square shaft extending through the plates |05 andV |06 and journaled at its ends in the frame I4 and rotatable in these plates; a slide ||2 shown as formed of a pair of rods ||3` connected together at one end and between their ends, by cross @plates ||4 and |15, respectively,

` the rods ||3 beingslidably mounted in the webs |01; and :an arm ||6 connected with the cross plate ||4 and provided with'a clevis ||1 pivoted thereto at |8, in which clevis the polishing element I6 is mounted.

The polishing unit |03 also comprises means for actuating the slide ||2 to advance or retract the polishing element I6 relative to the rolls ofthe mill, these means comprising the square shaft a lever I9 rigid with this shaft and extending at its outer end into an opening |20 in the cross plate ||5; a lever |2| provided with an adjustable weight |22, fixed `on the shaft I and the lever |2| in raised position.

The latch means |23 comprise an arm |24 pivoted at its upper end, as represented at |25 to a stationary bracket |26 on the frame I4 of the mill, and` having a shoulder |21, and a, pin` |28 on the lever |2| which rests on the shoulder |21 when the lever |2| is in upwardly swung position in which position the polishing element |6 is withdrawn from operating position. Upon element I6 against them'. A bevelsurface |29 on the carriage 23.

mill; the other chain |3| being connected at one end to the plate 25 of carriage 23 and at its other sheets of any desired number; or they may be stones, either stationary or revolving, which may be mounted in the clevises.

A valve |38 in the air exhaust pipe 18 settable to throttle the flow asdesired, serves the purpose of regulating the speed ofthe polishers and also to provide a cushion against shocks and to avoid jerky movement of the mechanism.

f If desired, a construction `like the lever and latch mechanism of the upper polishing unit may be substituted for the means shown for controlling the positioning of the slide 29 :relative to While I have illustrated and described a particular embodiment of my invention I de not wish to be understood as intending to limit it thereto as the construction shown may be variously modified and altered and the invention embodied in other forms of structure Without departing from the spirit of my invention.

' What I `claim as new and desire to secure by Letters Patent, is:

1; In combination: a movable member; a fluid pressure operated piston and cylinder mechanism for actuating said member; and automatic valve mechanism for admitting fluid pressure at one end of the cylinder and then the opposite end alternately to reciprocate the piston, including reciprocating plunger valves, a centrally pivoted rock member having lost motion connections with said plunger valves, a movable pivot having means when the swinging link is oscillated over the pivot of the rock member, and a push rod having a pivoted link making a lost motion connection with said swinging link and provided with a pair of spring abutments disposed for alternate engagement by said movable member to reciprocate said push rod.

2. Apparatus as specied in claim 1, in which the movable pivot is carried by a pivoted. lever and the means for urging it towards the rock mem- .ber includes an adjustable weight mounted on said lever.

PAUL HAIG. 

